As far as I can figure, the bots have pretty awful path finding if a map is not made correctly in a custom map (if that's what you're talking about).
Map makers will sometimes accidently miss filling in a wall or a rock, which leads to pleanty of bullsh*t moments where you can't glitch through a wall but not a bot.

As for getting into rocks themselves (assuming you mean the rocks I showed in the video) I can't help you. I spent a good amount of time trying to get into them with no luck (so many rocks).

i saw a bot do it

make a guide how to go in side the rock